kern/140338: FreeBSD 8.0 RC2 with vm.pmap.pg_ps_enabled=1 kernel panic with makeworld

[Patrick Lamaiziere]

The following reply was made to PR kern/140338; it has been noted by GNATS.

From: Patrick Lamaiziere <patfbsd at davenulle.org>
To: bug-followup at FreeBSD.org <bug-followup at FreeBSD.org>
Cc: Kai Gallasch <gallasch at free.de>
Subject: Re: kern/140338: FreeBSD 8.0 RC2 with vm.pmap.pg_ps_enabled=1
 kernel panic with makeworld
Date: Fri, 6 Nov 2009 19:36:54 +0100

 Le Fri, 6 Nov 2009 17:28:40 GMT,
 Kai Gallasch <gallasch at free.de> :
 
 Hello,
 
 > ZFS filesystem version 13
 > ZFS storage pool version 13
 
 It seems you are using ZFS on this box?
 
 Well, I saw a similar this issue with 8.0 BETA 4/i386 but only with ZFS.
 Here it's 100% reproductible when I want to copy my /usr on a ZFS tank :
 
 tar cf - -C /usr . |=A0tar xpvf - -C /pool
 
 I was not able to dump the panic but the trace was :
 
 panic vm_fault : fault on no fault entry
 
 free()
 zfs_acl_node_free()
 zfs_acl_release_nodes()
 zfs_acl_free()
 zfs_zaccesss()
 zfs_freebsd_create()
 VOP_CREATE_APV()
 vn_open_read()
 vn_open()
 kern_openat()
 kern_open()
 open()
 syscall (open())
 
 I saw this panic in the write() syscall too, always when freeing
 something.
 
 On the same box, I've used super-pages for a longtime on FreeBSD 7.2 and
 with 8.0/BETA without any problem (but without ZFS too). Since
 I've turned off super-pages, ZFS is stable.
 
 Regards.
 (I'm sorry to no be able to provide more useful informations)